Automatic sash-lock.



UNITED STATES PATENT OFFICE;

ALEXANDER WILLIAM ADAMS, OF TORONTO, CANADA.

AUTOMATICSASH-ILOCK.

SPECIFICATION forming part of Letters Patent No. 719,981, dated February10, 1903.

Application filed July 18, 1901. Serial No. 68,806. (No model.)

To all whom it may concern:

Be it known that I, ALEXANDER WILLIAM ADAMS, carpenter, of the city ofToronto, in the county of York, in the Province of Ontario, Canada, haveinventedcertain new and useful Improvements in Automatic Sash- Locks, ofwhich the following is a specificae catch suitably pivoted therein, andthe other member on the opposing sash having a swinging link designed toswing down when the window is open 'and be guided in position by 1 thebeveled form of the other member when the window is being closed, theparts being otherwise constructed and arranged in detail as hereinaftermoreparticularly explained.

Figure 1 is a perspective View of a window, showing the generalconstruction and arrangement of my improved fastener when the window isclosed. Fig. 2 is a longitudinal section, intermediately broken away,showing the fastener with the window closed. Fig. 3 is a similar Viewshowing the position when the window is open. larged sectional detail ofthe fastener with the window closed. Fig. 5 is an enlarged perspectiveview with one side broken away to exhibit the construction andarrangement of my invention. Fig. 6 is a detail of the opposing member.

In the drawings like letters ofreference indicate corresponding parts ineach figure.

A is the upper sash, and B is the lower sash, and a is the lower rail ofthe upper sash, and b is the top rail lower sash. The upper rails of thesashes are beveled in the ordinary manner, so as to close and fitagainst each other.

C is one member of the fastener, which is provided with a substantiallybeveled back 0, with a curved upper portion 0, such portion 0 beingfastened to the lower rail of the up- Fig. 4 is an enper sash bysuitable screws passing through the holes 0 in the end flanges O.

, D is a catch, whichextends through a rectangular opening 0 in thefront of the member O. The catch D is normally when locked in a slantingposition and has a curved or arcshaped bottom cl and is suitably pivotedon the pin 61. The catch D has an upward extension D, between the jaws dof which is pivoted the hooked catch d 0 is a rectangular opening abovethe opening 0 The opening 0 is provided with inclined top and bottomedges, as indicated.

F is a spiral spring extending between the inside of the catch D and theinside of the back of the member 0 and suitably held in position. I

E is the opposing member, which is suitably fastened to the top rail ofthe lower sash by suitable screws passing through the holes 6.

E is a swing-link, which is preferably rectangular in form and providedwith an inner connecting cross-bar E which is integral with the link andthe ends of which depend through notches e. The bar E fits closelyagainst the edge rib e on the inner side of the member E. The bar E isprovided with a notch E on the two sides thereof, into which notchextends the end of the flat spring E, which is secured to the plate E atthe outer side, as indicated. The end of the link E is beveled, asindicated.

I shall now describe the operation and utility of my lock. As shown inFigs. 1 and 2, the catch D is shown as extending over the edge of themember E and the link E as extending over and straddling the member 0.To open the window, it is simply necessary to press upon the catch D,forcing it inwardly against the spring F until the pivoted catch d movesthrough the opening 0 and catches upon the edge thereof. In thisposition it will be readily seen from the dotted lines shown in Fig. 4that the outer face of the catch D will be flush with the face ofthememher 0, and therefore the lower sash may be pushed upwardly or, asshown in Fig. 3, the upper sash pushed downwardly, this making, ofcourse, no difference in the catch working. When the lower sash ispushed downwardly, the edge of the member E contacts with the end of thecatch (1 as shown in dotted lines,

and thereby relieves such catch, whereupon the spring forces the catch Doutwardly, it beforehand, however, having passed the member E, so thatit is free to move downwardly into any position or such as shown in Fig.3. When the top rail of the other sash moves past the swing-link E, itthrows it down'into the position shown in Fig. 3, and thus when the sashhas been raised again the top rail of the sash readily passes theswing-link. When, however, the upper sash is being thrown upwardly, thebeveled edge of the link E contacts with the substantially beveled end0' of the member 0, thereby throwing the swinglink to the horizontal andallowingit to pass down over the member E, the catch D being in suchmovement forced inwardly until it has passed the top edge of the memberE, when it springs back into position over the member E, when the windowis securely locked. In either position the link E is caused to assumethe spring E practically holds the link rigid or at least quite freefrom springing until it is engaged to throw it either up or down.

I may also mention that quite an advantage in the construction of myimproved window-fastener resides in the construction of the bottom ofthe main catch, which, it will be noticed, is arc-shaped. By this meanseven should the sash not come quite together the arc-shaped bottom willalways hold the window locked as long as any portion of it overtops thetop rail of the lower sash. It may also be mentioned that the inclinedor beveled back of the member of the fastener on the lower rail of theupper sash serves when the link of the opposing member passes over thesame to draw the rails together, and there by preclude any possibilityof rattling or dust or wind passing into the apartment. Such arc-shapedbottom may, if desired, be provided with cross-notches or corrugationsto prevent the possibility of it slipping.

What I claim as my invention is 1. In a fastener, the combination withthe upper and lower sashes, of a member secured to the lower rail of theupper sash and having inclined rear faces and a hinged link carried bythe lower sash and adapted to always overhang the top of the member onthe lower rail of the upper sash, such hinged link being caused to folddownwardly by the contacting with the top rail of the upper sash andthereby allow the top of the upper sash to pass beneath the level of thetop of the lower sash and yet pass over the member of the upper sashwhen the windows are about closed, as and for the purpose specified.

2. In adevice of the class described,-the combination with the onemember having an upward extension, of an opposing member having aswing-link provided with a substantially square cross-bar extendingunderneath the member and close to the under edge of the same and a flatspring held to the member and extending against one of the sides of thebar, so as to hold the link in a horizontal or vertical position and forthe purpose specified.

ALEXANDER WILLIAM ADAMS.

Witnesses:

B. BOYD, R. SHIELDS.

